Troubleshooting intermittent connectivity via LTM?

Does the failure happen often enough that you could reproduce the issue while capturing a tcpdump on the VE? If so, analyzing the tcpdump would go a long way towards diagnosing the issue.

 

 

Here is a general SOL on tcpdump:

 

 

sol411: Overview of packet tracing with the tcpdump utility

 

http://support.f5.com/kb/en-us/solutions/public/0000/400/sol411.html

 

 

You could try syntax like the following where you have all but one pool member disabled:

 

 

tcpdump -ni 0.0 -Xs0 -w/var/tmp/trace.1.dmp host CLIENT_IP or host POOL_MEMBER_IP

 

 

You can use WinSCP to copy the trace off VE and Wireshark to view the trace. If you need help capturing or analyzing the trace, you can open a case with F5 Support.

 

 

Or if you want some stabs in the dark from the community, you could post your (anonymized) virtual server, profiles and pool config using 'tmsh list ltm virtual VS_NAME list', 'tmsh list ltm pool POOL_NAME list', 'tmsh list ltm profile PROFILE_NAME list'.

 

 

Aaron